log periodic design

Choke Balun Designs - In this designs G8ODE explains different methods to builds a choke balun

Antennas : theory and designs - Thierry LOMBRY, ON4SKY, develops in several long articles all you need to know about antennas, their design and performance, for both amateurs and SWL

Win-Test contest logging software - Win-Test is a contest logging software compatible with all the operating systems Windows 32 bits without exception. All major international and many national contests are supported. Network TCP/IP capability, radios and CW interfaced, database-aided autocompletion, and much more...

VU2NAN QSL Collection - Qsl card collection at VU2NAN blog

I3CRW 60 years of radio and mountains - Large personal QSL collection by I3CRW

VU2SWX Ham Radio blog - TT’s Jottings-Blog of VU2SWX, Travails of an Indian Geek

URDE Navarra Spain - Web site of URDE in Navarra north Spain, a lot of news periodically update

Georgia Tech Amateur Radio Club - W4AQL``Georgia Tech Amateur Radio Club``Site for W4AQL, located at the Georgia Institute of Technology in Atlanta, Georgia.

F8ABX Radio Blog - Informations ondes courtes et radioamateurs - Shortwave and ham radio news

on4dsq audio file website - MP3 recording files, dx-ing, photo's, dxclusters, railsystem, online logbook

DPD Productions - Home of the TrainTenna and MilTenna. Uniquely designed antennas for Transmit or Receive Only, Indoors and Outdoors, Railroad, Aviation, Military, Ham, MURS, GMRS, and other services.

KEYCOM Characteristic Technologies - Millimeterwave/Microwave transmission lines and components, Cryogenic temperature application transmission cables and systems, Permittivity(Dielectric rate) and Permeabillity measurement systems, Antennas, Radar systems

Massachusetts Microwave Corporation - Provider of point-to-point microwave radio system sales, service, and integration, employing refurbished name brand digital (DS1/E1, DS3/E3) and analog video radios. Specializing in Microwave Associates (M/A-COM) , Digital Microwave Corp. (DMC/Stratex) and Alcatel/Rockwell microwave radios.

Bliley Technologies, Inc. - Quartz crystal oscillators, frequency control.

Montreal's MediumWave, FM, SW and TV DX - Information of propagation in and around montreal Canada for shortwave, am , fm and TV dxing, loggings section, propagation forecast and Sporadic E alerts, QSl page, updated frequently

ON5UR QSL print service - We are hams who design high quality full colour QSL cards. Now we print also full colour backsides on our QSL cards. 1000 cards costs only 82 Euro. For more details write max@on5ur.be``Remember: The QSO is short, our QSL cards are forever !

YagiCAD - A freeware software package for Yagi design. This webpage also contains many sample and standard antenna downloads for experimentation.

Smith chart calculator - linSmith is a Smith Charting program, mainly designed for educational use. It allows defining multiple load impedances (different frequencies), and adding components (discrete components and line sections) in series and parallel. It plots the impedances on the screen, shows the values in table format, and is able to generate publication quality Postscript output.

MicroLog by wa0h - Windows logging program by wa0h. US and Canadian callbooks are built into the cd version of the program.

AmRLog - Palm OS based shareware application by KC6AAB for Amateur Radio Operators. AmRLog is designed for logging mobile radio contacts.

MorseGen - MorseGen is a simple program the purpose of which is to generate Morse Code at whatever speed you feel comfortable reading, for practice purposes. It wasn't designed to be a tutor for those who know no Morse at all, although you might find it useful for that purpose. It doesn't have a feature for sending small character groups over and over, although this can easily be achieved by creating text files containing the character groups you want to practice.

FT1000MP-SuperControl - FT1000MP-SuperControl is a complete CAT control and "better than nothing" logging program, based on the legendary FT847-SuperControl program. The program has been developed especially for the FT-1000MP transceiver series including Mark-V and Field.

144 MHz preamplifier with BF981 - Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.

Regenerative Radio Receiver Circuit - Useful and well thought out regenerative receiver design

Build A Vector Network Analyzer - The VNA (vector network analyzer) is an essential tool for measuring the complex impedance of a circuit at a given frequency. Article on how to build a Impedance analyzer.